Bump doctrine/coding-standard from 8.2.0 to 9.0.0

Bumps [doctrine/coding-standard](https://github.com/doctrine/coding-standard) from 8.2.0 to 9.0.0.
- [Release notes](https://github.com/doctrine/coding-standard/releases)
- [Commits](doctrine/coding-standard@8.2.0...9.0.0)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

composer.json

@@ -20,7 +20,7 @@
     "license": "MIT",
     "require": {
         "php": "^7.2",
-        "doctrine/coding-standard": "^8.2"
+        "doctrine/coding-standard": "^9.0"
     },
     "require-dev": {
         "roave/security-advisories": "dev-master"